Lamp unit



FIG. 1 is a front elevational view of a lamp unit showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is an enlarged top plan view thereof; and,

FIG. 6 is an enlarged bottom plan view thereof.

The broken line showing is for environmental purposes only and forms no part of the claimed design. 

The ornamental design for a lamp unit, as shown and described. 